Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Biasing of FET01:22

Biasing of FET

753
Biasing a Junction Field Effect Transistor (JFET) is crucial for setting operational parameters and ensuring efficient functioning in electronic circuits. JFETs are characterized by using a single carrier type in N-channel or P-channel configurations, where the channel is surrounded by PN junctions. These junctions are central to the device's ability to control current flow.
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
753
Transmission Line Design Considerations01:23

Transmission Line Design Considerations

646
Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
646
Biasing of P-N Junction01:16

Biasing of P-N Junction

2.1K
The operation of a p-n junction diode involves various biasing conditions, including forward bias, reverse bias, and equilibrium.
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
2.1K
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

678
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
678
Gradient and Del Operator01:14

Gradient and Del Operator

4.6K
In mathematics and physics, the gradient and del operator are fundamental concepts used to describe the behavior of functions and fields in space. The gradient is a mathematical operator that gives both the magnitude and direction of the maximum spatial rate of change. Consider a person standing on a mountain. The slope of the mountain at any given point is not defined unless it is quantified in a particular direction. For this reason, a "directional derivative" is defined, which is a vector...
4.6K
Reducing Line Loss01:18

Reducing Line Loss

396
In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss in...
396

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Hyphenated structural identification of additives in transmission fluids.

The Analyst·2022
Same author

Rapid-melt DNP for multidimensional and heteronuclear high-field NMR experiments.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2019
Same author

Characterising polar compounds using supercritical fluid chromatography-nuclear magnetic resonance spectroscopy (SFC-NMR).

Faraday discussions·2019
Same author

ssNake: A cross-platform open-source NMR data processing and fitting application.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2019
Same author

Satellite nutation of half integer quadrupolar nuclei: Theory and practice.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2019
Same author

Hyphenation of Supercritical Fluid Chromatography and NMR with In-Line Sample Concentration.

Analytical chemistry·2018
Same journal

Localization-driven exchange contrast in diffusion exchange spectroscopy.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2026
Same journal

4.5 Tesla superconducting miniature magnet in liquid nitrogen.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2026
Same journal

Folding and unfolding dynamics of a DNA aptamer studied by heteronuclear <sup>1</sup>H-<sup>13</sup>C correlation zz-exchange spectroscopy.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2026
Same journal

Multi-spin control from one-spin pulses.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2026
Same journal

Altering MRI rotating frame relaxations by changing the truncation level of Hyperbolic Secant pulse.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2026
Same journal

Effects of proton exchange on the lifetimes of long-lived states in aliphatic chains.

Journal of magnetic resonance (San Diego, Calif. : 1997)·2026
See all related articles

Related Experiment Video

Updated: Feb 17, 2026

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
10:39

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

Published on: October 11, 2016

10.2K

B1 gradient coherence selection using a tapered stripline.

S G J van Meerten1, K C H Tijssen1, P J M van Bentum1

  • 1Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, Nijmegen, The Netherlands.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|December 1, 2017
PubMed
Summary
This summary is machine-generated.

Modern NMR experiments can be accelerated using off-resonance B1 field gradient (OFFBEAT) pulses. This technique simplifies coherence selection by suppressing chemical shift evolution, offering a cost-effective alternative to pulsed-field gradients.

Keywords:
Coherence selectionNMROff-resonance pulseRF gradientTapered stripline

More Related Videos

MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T
10:22

MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T

Published on: January 16, 2021

5.9K
In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx
09:49

In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx

Published on: May 13, 2020

4.4K

Related Experiment Videos

Last Updated: Feb 17, 2026

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
10:39

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

Published on: October 11, 2016

10.2K
MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T
10:22

MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T

Published on: January 16, 2021

5.9K
In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx
09:49

In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx

Published on: May 13, 2020

4.4K

Area of Science:

  • Nuclear Magnetic Resonance (NMR) Spectroscopy
  • Magnetic Resonance Imaging (MRI) Techniques

Background:

  • Pulsed-field gradients (PFGs) are standard in liquid-state NMR for coherence pathway selection, reducing experiment times.
  • PFGs are typically B0 gradients, but B1 gradients can achieve similar spatial encoding.

Purpose of the Study:

  • To demonstrate the conversion of standard NMR pulse sequences using PFGs to sequences employing off-resonance B1 field gradient (OFFBEAT) pulses.
  • To highlight the advantages of B1 gradient pulses for coherence selection in NMR.

Main Methods:

  • Conversion of existing PFG-based NMR pulse sequences to utilize OFFBEAT pulses.
  • Implementation of a tapered stripline for generating well-defined B1 field gradients.
  • Experimental validation of B1 gradient coherence selection.

Main Results:

  • Pulse sequences with PFGs can be readily adapted to use OFFBEAT pulses.
  • B1 gradient pulses partially suppress chemical shift evolution during pulses, eliminating the need for refocusing echoes.
  • A tapered stripline effectively creates a defined B1 field gradient.

Conclusions:

  • OFFBEAT pulse sequences offer a simplified and potentially faster alternative to PFG-based sequences in NMR.
  • B1 gradient coherence selection using a tapered stripline is a practical, economical substitute for B0 PFGs.